Thermprocestechniek I

Chamber Furnaces Gas-Fired

Certain heat treatment processes require a gas-fired chamber furnace. Short heating times due to the high power are a convincing argument. The chamber furnaces with powerful atmospheric gas burners cover a wide variety of these processes. In the basic version the burners are manually ignited once at the start of the process. The automatic control system then takes over control of the temperature curve. At program end, the burners are automatically switched off. Depending on the process, the furnaces can be equipped with automatically controlled fan burners and safety technology for debinding. Depending on the model, these furnaces can be upgraded with fully automatic fan burners and additional accessories.

Chamber Furnaces Electrically Heated

These universal chamber furnaces with radiation heating have been specifically designed to withstand heavy-duty use in the heat treatment shop. They are particularly useful for processes such as tool making or for hardening jobs, e.g. annealing, hardening and forging. With help of various accessories, these furnaces can be customized to your application requirements.

Chamber Furnaces, Sheet Metal Preheating Furnaces Electrically Heated

Annealing furnace with electro-hydraulic lift door on transportable base for preheating of large steel sheets for the automotive industry.

Door heating element as additional equipment

N 6080/13S preheating furnace for forging; with door-in-door

N 761 with annealing box and charging cart

Furnace chamber with optional heating elements in the ceiling when used for preheating of sheetmetal plates

These very rugged chamber furnaces with radiation heating are designed for continuous heat-treatment processes. They are ideally suited for forming processes such as forging or hot forming steel sheets. The use of a wide variety of accessories enables these furnaces to be tailored to the relevant application.

Holding time measurement for the charge until it goes to forging or forming of steel sheets: After charging, the operator presses a key and the previously defined holding time for the load begins to run. The end of the holding time is indicated by both acoustic and optical signals, meaning that the charge can be removed.

Heat resistant zinc paint for protection of door and door frame

Defined application within the constraints of the operating instructions

Additional equipment

Other temperatures on request

SiC plates to protect the wall heating elements

Electro-hydraulic lift door for models to N 951

Protective gas ports in combination with silicone sealing of the chamber

The chamber furnaces in the model series NB .. CL are used for heat cleaning of components. An optimum temperature uniformity is not a priority for these processes. Examples are heat cleaning of electric motors, coated surfaces of steel components or the nozzles of plastic injection molding machines. The furnaces are gas-fired and have an integrated thermal afterburner system which is also gas-fired. The pre-set, low-oxygen respectively reducing atmosphere in the furnace effectively prevents spontaneous combustion at the workpiece and subsequent damage as a result of over-temperature. The generated exhaust gases are guided from the furnace chamber into the thermal afterburner where they are incinerated. Depending on the type of exhaust gas involved complete incineration is possible. For safe operation, the furnace door locks after program start and cannot be opened again until the temperature has dropped below 180 °C at the process end. In case of a burner flame malfunction or gas shortage the process is aborted. In addition, the control system is equipped with an over-temperature limiter with manual reset that is set by the customer at a safe cut-off temperature to switch off the furnace if the limit is exceeded. The furnaces are not suitable for components and coatings that contain solvents or a high concentration of water. These models must also not be used for charges with low flash points such as wood, paper or wax.

The chamber furnaces of the model series N .. BO are used for thermal cleaning of components. Examples include the removing residual wax of pouring clusters inclusive subsequent sintering or the thermal cleaning of oxide catalytic honey combs from carbon black or fuel residues. The furnaces are electrically heated or gas-fired. The electrically heated furnaces, for safety reasons, have an integrated gas torch for igniting hazardous gas concentrations. The generation of combustible mixtures is avoided and their safe burning off is ensured.

The furnace series is suitable for products that will not be damaged by a temporary, uncontrolled temperature rise.

The burning of unwanted organic ingrediants can take place at temperatures > 400 °C. Following this, a subsequent process can take place up to max. 1000 °C or 1400 °C (electrically) or 1000 °C (gas-fired).

For safety, the furnace door locks after the program was started and cannot be opened again until the temperature has dropped below a defined value. In case of burner malfunction or gas shortage the process is aborted.